NatureMapping Animal Facts

Anna's Hummingbird

The Anna's Hummingbird (Calypte anna) was named after the 19th century Italian duchess Anna De Belle Massena.Colibrí del Anna - en Español
Species Code: CAAN

Description:
Anna's Hummingbird is a medium-sized hummingbird, 4 inches in length, with iridescent green back and grayish-white underparts and greenish or golden flanks. In the sunlight, the back is bright green and the underparts are grayish white.
The colorful adult male has an iridescent rose-colored crown and gorget that extends to the sides of the neck, and a partial pale eye-ring (see photos below). Small white spot behind the eye. Wing feathers dark. White tufts on either side of rump.
The female has an overall dusky appearance with a green back and gray throat patch (see photo to the right). Females have green heads, with a small amount of red on their throats. Immatures resemble the adult female.

Hummingbirds are part of the Trochilidae family found only in the Americas. They are unknown in the Eastern Hemisphere. With 343 species, hummingbirds make up the Western Hemisphere's second largest family of birds.

Range / Habitat:

Originally found only on the Pacific slope from Baja California to San
Francisco, Anna's Hummingbird has increased its population and expanded
its breeding range in recent years to Vancouver, British Columbia, east
to southern Arizona. (Cornell Laboratory of Ornithology)

There are four species of hummingbirds found in the Pacific Northwest:
Anna's,
Black-chinned,
Calliope, and
Rufous.

Of these four species, only Anna's Hummingbird can be found year round the Puget Sound region of western Washington. The other three species of hummingbirds arrive in early spring,
when native plants begin to bloom, and usually depart by October to migrate to Mexico or the Southern United States.

The increasing popularity of hummingbird feeders and of urban plantings that provide flowers in blossom year-round are the major reasons for
the range expansion of Anna’s Hummingbird northward into Washington.

Diet: Anna's Hummingbirds feed on nectar from flowers and feeders, as well as small insects and spiders.
This hummingbird consumes more insects than any of the other North American hummingbirds, catching small flying insects on the wing. Plucks spiders and trapped insects from spider webs.
They also visit sapsucker holes and feed on sap and insects attracted to the holes. (Seattle Audubon Society)

Hummingbirds feed about 5-10 times per hour for 30-60 seconds each time.
Hummingbirds feed through a long, tube-like tongue that darts into the flower's corolla for nectar.
The tongue, shaped like a "W", uses capillary action to absorb the nectar much like a paper towel absorbs water.

Behavior:
A hummingbird can rotate each of its wings in a circle, allowing them
to be the only bird that can fly forwards, backwards, up, down,
sideways or sit in sheer space. To hover, hummingbirds move their wings
forward and backward in a repeated figure eight, similar to the arm movement of
a swimmer treading water. Hummingbirds can move instantaneously in any
direction, start from its perch at full speed, and doesn't necessarily
slow up to land. Hummingbirds can even fly short distances upside down,
a trick rollover they employ when being attacked by another bird. (source: humming-birds.com)

Nesting:
As is the case with other hummingbird species, male and female Anna's Hummingbirds associate only long enough to mate. The female is responsible for construction of the nest and care of the young. The breeding season begins in December and usually lasts until May or June.
Females will lay a clutch of only two white eggs and will produce only one brood per season. The hummingbird eggs are roughly the size and shape of a small jellybean. The hatchlings will remain in the nest for three weeks.

Did you know?

Anna's Hummingbird wings beat about 40-50 times per second in normal flight

30% of a hummingbird's weight consists of flight muscles

Hummingbirds fly about 25mph in normal flight and up to 40mph in a courtship dive

The heart beats about 250 times per minute while at rest, about 1,220 per minute while flying, but slows to 50 beats per minute at night (this is called torpor).

It takes about 250 breaths per minute while at rest

A hummingbird has a mass of about 3-4g (a nickel weighs about 5g); may nearly double mass prior to migration by putting on extra fat

A tiny hummingbird can consume up to 50% of its weight in nectar each day.

Anna's Hummingbird is the only hummingbird regularly seen in winter along the West Coast.

The colors of the crown and throat appear to change when this male turns its head. From a side view, the head looks gray, but from a face-on view, the rose color of this male is displayed.